gitlab: add .gitlab-ci.yml for gitlab CI

See-also: https://docs.gitlab.com/ee/ci/yaml/
5 jobs for th/gitlab-ci in 13 minutes and 48 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #32048
allowed to fail
checkpatch

00:00:08

passed #32015
f28_build_default

00:13:39

passed #32016
f28_rpm_autotools_dbg

00:13:23

passed #32017
f28_rpm_meson_dbg

00:10:00

failed #32014
allowed to fail
checkpatch

00:00:15

 
Name Stage Failure
failed
checkpatch Test
Running on runner-0c8a5dc6-project-411-concurrent-0 via acacia...
Cloning repository...
Cloning into '/builds/NetworkManager/NetworkManager'...
error: RPC failed; curl 56 LibreSSL SSL_read: SSL_ERROR_SYSCALL, errno 104
fatal: The remote end hung up unexpectedly
fatal: early EOF
fatal: index-pack failed
/bin/bash: line 61: cd: /builds/NetworkManager/NetworkManager: No such file or directory
ERROR: Job failed: exit code 1